Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7a4ab5eb024abf…

MALICIOUS

PDF

83.5 KB Created: 2021-09-13 02:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3361af6230b67d9f5fdc9a04230202ec SHA-1: edfcbb9b08cb525085f2a92c1ab00ca0f6f07e87 SHA-256: 0f7a4ab5eb024abf3bc26c8991efc6501240a5784c6421532e876d3e61fe0eeb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple domains, some of which are identified as compromised CMS uploads or disposable hosting. The presence of 'utm_term=shop+apk+download' in one URL suggests a lure for users seeking to download applications. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://medi-sen.com/files/files/tidaka.pdf In PDF document text
    • https://rintrans.com/files/somodolidoxefote.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/xelaxitotoriv.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/61997745529.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pumiwazotunemuv.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/miliwir.pdfIn PDF document text
    • http://ctm.it/userfiles/file/6435575365.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/marafivikoniput.pdfIn PDF document text
    • http://www.farmaciabergua.com/userfiles/files/58833084714.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/gimaforepivekobaxepogam.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/60629327756.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/dupuxemazudigibadaz.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/41652760302.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/95706012378.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/93590394006.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/66557425784.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/tunuxonoxovepakigetomatoz.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16133d8d9dc6d3---52029984833.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/lanalilezufisuju.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeb0398e3f---xoziwazekitugote.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/70506795192.pdfIn PDF document text
    • http://ch-bovi.com/upload/files/mafopibomikaporuka.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///funupelexamedidofobonozu.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/sodutodifunu.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/3cc39a34655e5e3846b96de951b93cf6/tujisofaguvibisowotupujaz.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/tasazexamivofode.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=shop+apk+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE214 18368 bytes
SHA-256: b914a22836821a243e18a0bf3256fa35eb5ecf019956fb3941f8891cba4a63ad
font_01_sfnt_off00011199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11199 10152 bytes
SHA-256: 91ddf3068e428e198494b22b349cdeb748ec1fa8cfe4a486a9e2aa1f4ed527c9
font_02_sfnt_off00012849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12849 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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